lovecoding
/
VIP22


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
      margin: 0;
      padding: 0;
    }
    html,body{
      height: 100%;
    }
    body{
      background: #ccc;
      display: flex;
      /* 纵轴对齐方式 */
      align-items: center;
      /* 横轴对齐方式 */
      justify-content: center;
    }
    #div1{
      width: 200px;
      height: 200px;
      background: red;
    }
  </style>
</head>
<body>
  <div id="div1"></div>
</body>
</html>